<!DOCTYPE html >
<html >
<head>
<meta charset="UTF-8">
<title>MyPage</title>
<style>
    div{
		width: 300px;
		height: 300px;
		border:100px solid blue;

	}
</style>
</head>
    <body>
    	<div>
    		helloworld
	    </div>    
</body>
</html>